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鲁龙龙,张彦敏.双态组织Ti80合金的动态再结晶行为[J].稀有金属材料与工程(英文),2021,50(8):2979~2985.[Lu Longlong and Zhan Yanmin.Dynamic recrystallization behavior of Ti80 alloy with bimodal structure[J].Rare Metal Materials and Engineering,2021,50(8):2979~2985.]
Dynamic recrystallization behavior of Ti80 alloy with bimodal structure
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Received:September 11, 2020  
DOI:
Key words: Ti80 alloy  dynamic recrystallization  critical strain  kinetics
Foundation item:河南省杰出人才创新基金;河南省重点攻关项目
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Lu Longlong and Zhan Yanmin  
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Abstract:
      The thermal compression tests of Ti80 alloy with bimodal microstructure was conducted at the deformation temperature of 860-980℃ and the strain rate of 0.01~1s^(-1)on the Gleeble-1500 thermal-mechanical simulator. The flow stress and dynamic recrystallization behavior of the alloy during hot deformation were investigated, the critical strain of dynamic recrystallization was determined with the help of the work hardening rate. The results show that dynamic recrystallization is an important softening mechanism during hot deformation of Ti80 alloy, and the critical strain of dynamic recrystallization decreases with increasing temperature and decreasing strain rate. Based on the Z parameter and the improved Avrami equation, the critical strain and kinetics model for dynamic recrystallization of Ti80 alloy were constructed.